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G. E. MANSFIELD, J11. CLOSURE FOR JARS.

APPLICATION r1150 111111.29. 1916.

1,195,057. Patented Aug. 15,1916.

I I I I ,1 1/ l I l/ I WITNESS: INVEN TOR,

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UNITED sans rarer anion.

GEORGE E. MANSFIELD, JR., 013 SPRINGFIELD, MASSACHUSETTS.

CLOSURE FOR JARS.

Application filed March 29, 1916.

To all whom it may concern:

Be it known that I, Gnonon EDWARD hIANSFIELD, J r., a citizen of the United States of America and resident of Springfield. in the county of Hampden and State of Massachusetts, have inventedcertain new and useful Improvements in Closures for Jars, of which the following is a full, clear, and exact description.

This invention relates to improvements in closures for jars of a type characterized by the provision at the mouth portion of the jar of cam inclined lugs, and the provision of a yoke adapted to engage the cap or stopper of the jar and also to have interlocking engagements with the lugs around the mouth of the jar which have inclines on the under sides thereof.

The object of this invention is to provide forms, constructions and arrangements of parts operable through the movement of the yoke to both confine the cap tightly on the jar and also to release the cap or place it in a condition to be released from its closing relation to the mouth of the jar.

The invention is described in conjunction with the accompanying drawings and is set forth in the claims.

In the drawings :Figures 1 and 2 are respectively a plan and side elevation showing the jar, and the cap and yoke as in readiness to be confined on the jar. Figs. 8 and 4 are respectively a plan and side elevation of the jar, and the cap and yoke shown as having their confining positions, the dotted lines representing the positions to which the yoke may be moved relatively to the immovable cap and jar to effect the conditions for the release of the cap. Fig. 5 is a central vertical section on line 55, Fig. 3.

In the drawings, A represents the jar having lugs a extending outwardly beyond its periphery at its mouth portion, each lug having inclining or expanding surfaces a at its under side, the inclinations of all being in the same direction around the jar.

B represents the closing cap for the jar, the same having a plurality of peripheral cam shaped or eccentric surfaces 2) b, which surfaces have their radial expansion in a direction the reverse of the direction of expansion of the lugs. As Fig. 3 is viewed, the downward expansion of the lugs is in the direction of the arrows, while, as clear, the outward expansion of the surfaces Z) of the cover is in the opposite direction.

Specification of Letters Patent.

Patented Aug. 15, 1916.

Serial No. 87,480.

The cap has shoulders (Z (Z at the junction of the prominent. portions of the one cam 7) with the contracted portions of the next. The yoke which is the element for the confinemcnt of the cap on the jar comprises portions 6 to overlie the cap, downwardly turned portions f and inwardly turned portions 9 for engagement under the cam lugs. The downwardly turned portions f are essentially resilient, although in practice some or all other portions of the yoke may be of metal suiiiciently thin as to render the yoke more or less resilient throughout.

Figs. 1 and 2 show the relations of the parts preparatory to tightly securing the cap on the jar. Here the downturned and inturned extremities of the yokes are positioned in the spaces or intervals between the .cam lugs and the cap is placed on the jar so that the shoulders (Z are about coincident with the ends of the cam lugs.

By full lines in Figs. 3 and 4 the yoke and cap are shown as having been moved around so as to carry the inturned projections. of the yoke to binding impingements against the downwardly expanded portions of the cam lugs; and in the action of so doing the yoke having engagements with the cap shoulders cl forces the cap around to such a position that on the reverse revolving movement of the yoke it will necessarily impinge against the prominent or expanded cam surfaces Z) of the cap to readily spring the extremities of the yoke out from engagement with the jar cams, leaving the cap free for removal.

Usually after the caps have been secured and have remained secured, it is somewhat difficult to free the caps from the jar owing to the vacuum created within the jar; but these jars as constructed readily permit, when the yoke has become disengaged from the lugs, the insertion of a blade or sharp instrument between the cap and upper end of the jar for the breaking of the vacuum.

The yoke is here shown as one having diametrically opposite pairs of prongs although the number of such prongs may be three or two, if desired. The yoke in Fig. 5 is shown as having a central depending boss or stud h for a centering and pivotal engagement in the depression 2' in the top of the cap, whereby the yoke for its revoluhle action relatively to the cap and jar may be on an invariable axis.

It may be stated that one of the advantages of this device consists in the ability to throw the cam engaging portions of the yoke outwardly from their engagements withmit exerci. -ng care to bring such engaging portions into the spaces between the ends oi the cam lugs; in fact when the yoke is reversely turned to secure the impingeinents by the cap cams 7) against the down turned portions of the yoke, such portions have positions ollside from the separating spaces between the cam lugs, at which places the blade for prying up the cap to break the yacuuin may be most conveniently used.

I claim 1. A jar having, at the periphery of its mouth portion, a plurality of cam lugs, all downwardly inclining or expanding in the same direction around the said mouth portion, a closing cap for the jar having a plu rality of peripheral cam shaped or eccentric surfaces, radially expanding in a direction the reverse of the direction of expansion of the lugs, and a yoke consisting of portions adapted to overlie the cap, and downwardly and inwardly turned portions, the clownwardly turned portions essentially being resilient and adapted by the impingement thereof against the cam surfaces of the cap to be displaced radially outwardly for the disengagement of the yoke from the cam lugs.

2. A jar having, at the periphery of its mouth portion, a plurality of cam lugs, all downwardly inclining or expanding in the same direction around the said mouth portion, a closing cap for the jar having a plurality of peripheral cam shaped or eccentric surfaces, radially expanding in a direction the reverse of the direction of expansion of the lugs, and having shoulders at the junction of the prominent portions of the one cam with the contracted portion of the next cam, and a yoke consisting of portions adapted to overlie the cap, and resilient downwardly turned portions, and inwardly turned portions for engagement under the cam lugs, the resilient downwardly turned portions being adapted by the impingement thereof against the cam surfaces of the cap to be displaced radially outwardly for the disengagement of their inturned extremities from the cam lugs.

Signed by me at Springfield, Mass, in presence of two subscribing witnesses.

GEO. E. MANSFIELD, JR. Vitnesses YVM. S. BnLLows, G. R. DRISCOLL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of lPatents,

Washington, I). C. 

